Issue 2, which seeks to block Issue 3 and prevent future business interests from installing monopolies in the state constitution, is headed for approval with 55.8 percent support, 30.4 percent opposition and 13.7 percent undecided, the poll found.

The poll, conducted by Zogby Analytics, surveyed 804 Ohio voters and has a margin of error of plus or minus 3.5 percentage points. The survey queried slightly more Democrats than Republicans and independents.

Pollsters also found support for legalization stronger among African-Americans, young voters and fans of hip-hop and classic rock.